/* ========== 苹果风格设计 ==========
   极简主义、精致细节、优雅排版
   ================================= */

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 跳转到主要内容链接（可访问性） */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #0071e3;
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 6px;
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.skip-link:focus {
    top: 6px;
}

/* 苹果风格变量 - 黑白主题 */
:root {
    /* 苹果官方色彩 - 黑白 */
    --apple-blue: #000000;
    --apple-gray: #86868b;
    --apple-light-gray: #f5f5f7;
    --apple-dark-gray: #1d1d1f;
    --apple-black: #000000;
    --apple-white: #ffffff;
    
    /* 背景色 */
    --background-primary: var(--apple-white);
    --background-secondary: var(--apple-light-gray);
    --background-tertiary: #ffffff;
    
    /* 文字颜色 */
    --text-primary: var(--apple-black);
    --text-secondary: var(--apple-gray);
    --text-tertiary: #6e6e73;
    
    /* 边框和分割线 */
    --border-color: #d2d2d7;

    /* 磨砂玻璃半透明背景（呼应 logo 绿色透出） */
    --bg-glass-section: rgba(255, 255, 255, 0.35);
    --bg-glass-card: rgba(255, 255, 255, 0.55);

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    
    /* 间距系统 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --background-primary: #000000;
        --background-secondary: #121212;
        --background-tertiary: #1c1c1e;
        --text-primary: var(--apple-white);
        --text-secondary: #aeaeb2;
        --text-tertiary: #8e8e93;
        --border-color: #3a3a3c;
        /* 磨砂玻璃半透明背景（深色模式） */
        --bg-glass-section: rgba(28, 28, 30, 0.55);
        --bg-glass-card: rgba(28, 28, 30, 0.70);
    }
    /* 深色模式：绿色光晕略减淡，磨砂层改用半透明黑 */
    body {
        background-image:
            radial-gradient(circle at 15% 15%, rgba(160, 240, 96, 0.07) 0%, transparent 45%),
            radial-gradient(circle at 85% 70%, rgba(160, 240, 96, 0.05) 0%, transparent 50%);
    }
    body::before {
        background: rgba(0, 0, 0, 0.35);
    }
}

/* 苹果字体栈 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.4;
    color: var(--text-primary);
    background-color: var(--background-primary);
    /* 淡绿色径向光晕：呼应 logo 主色 rgb(160,240,96) */
    background-image:
        radial-gradient(circle at 15% 15%, rgba(160, 240, 96, 0.10) 0%, transparent 45%),
        radial-gradient(circle at 85% 70%, rgba(160, 240, 96, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 全页磨砂玻璃层：柔化底层绿色光晕，形成朦胧质感 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(50px) saturate(160%);
    -webkit-backdrop-filter: blur(50px) saturate(160%);
    z-index: -1;
    pointer-events: none;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* 头部导航 - 苹果风格 */
header {
    background-color: #000000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--space-xl);
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--apple-white);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color 0.2s ease;
    flex-shrink: 0;
}

.logo:hover {
    color: rgba(255, 255, 255, 0.7);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.2s ease;
    position: relative;
    white-space: nowrap;
    padding: 4px 0;
}

.nav-links a:hover {
    color: var(--apple-white);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--apple-white);
    transition: width 0.2s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* 英雄区域 - 苹果风格 */
.hero {
    padding: var(--space-4xl) 0 var(--space-3xl);
    text-align: center;
    background: var(--bg-glass-section);
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1.1;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.5;
    font-weight: 400;
}

/* 主要内容区域 */
.main-content {
    padding: var(--space-2xl) 0;
}

/* 模块区域 */
.module-section {
    padding: var(--space-3xl) 0;
}

.module-section:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

/* 业务板块网格 - 苹果卡片风格 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.service-card {
    background: var(--bg-glass-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 0, 0, 0.1);
}

.service-card-link {
    text-decoration: none;
    cursor: pointer;
}

.service-card-link:hover {
    border-color: var(--apple-black);
}

.service-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.service-card p {
    color: var(--text-tertiary);
    line-height: 1.6;
    font-size: 16px;
}

/* 科技媒体模块 - 简化版（无二维码卡片） */
.media-card {
    background: var(--bg-glass-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    gap: var(--space-lg);
}

.media-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.media-card-icon {
    font-size: 32px;
    line-height: 1;
    flex-shrink: 0;
}

.media-card-content {
    flex: 1;
    min-width: 0;
}

.media-card-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.media-card-content p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-top: var(--space-sm);
}

.social-links {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    background: var(--background-secondary);
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.social-link:hover {
    background: var(--text-primary);
    color: var(--background-primary);
    transform: translateY(-1px);
}

.platform-links-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--background-secondary);
    border-radius: 24px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.platform-btn:hover {
    background: var(--background-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.platform-btn span:first-child {
    font-size: 16px;
}

/* App 展示 - 极简Apple风格 */
.apps-showcase {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    align-items: stretch;
}

/* Amazing Life 系列卡片 */
.app-series-card {
    background: var(--bg-glass-card);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    min-width: 320px;
    flex: 1;
    max-width: 480px;
    display: flex;
    flex-direction: column;
}

.app-series-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.app-series-header a {
    display: block;
    text-decoration: none;
}

.app-series-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
    transition: color 0.2s ease;
}

.app-series-header a:hover h3 {
    color: var(--accent-color);
}

.app-series-header p {
    font-size: 13px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.app-series-header a:hover p {
    color: var(--text-primary);
}

.app-series-items {
    display: flex;
    gap: var(--space-md);
}

/* 系列中的单个 app 条目 */
.app-item-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    min-width: 0;
}

.app-item-card:hover {
    background: rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.app-item-card .app-icon-img {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    margin-bottom: var(--space-sm);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.app-placeholder-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    background: rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
}

.app-item-content h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.app-item-content p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 6px;
}

.app-item-content a {
    font-size: 13px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.app-item-content a:hover {
    opacity: 0.75;
}

.app-coming-soon {
    font-size: 12px;
    color: var(--text-tertiary);
}

.app-showcase-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xl);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-showcase-card:hover {
    transform: scale(1.02);
}

.app-visual {
    margin-bottom: var(--space-lg);
}

.app-icon-img {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.04),
        0 8px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.app-showcase-card:hover .app-icon-img {
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.08),
        0 16px 40px rgba(0, 0, 0, 0.12);
    transform: scale(1.02);
}

.app-content h3 {
    font-size: 21px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.app-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-weight: 400;
}

.app-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--apple-black);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.app-link:hover {
    color: var(--text-secondary);
}

.app-link-arrow {
    transition: transform 0.2s ease;
}

.app-link:hover .app-link-arrow {
    transform: translateX(3px);
}

/* Agentz 仓库/主页链接按钮 */
.repo-links {
    display: flex;
    gap: 12px;
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.repo-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 主页：实心主按钮，自适应深色模式（亮色黑底白字 / 深色白底黑字） */
.repo-link-home {
    background: var(--text-primary);
    color: var(--background-primary);
}

.repo-link-home:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* GitHub：描边次级按钮，hover 反转 */
.repo-link-github {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
}

.repo-link-github:hover {
    background: var(--text-primary);
    color: var(--background-primary);
    transform: translateY(-2px);
}

/* Gitee：浅灰底三级按钮 */
.repo-link-gitee {
    background: var(--background-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.repo-link-gitee:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.repo-link-arrow {
    transition: transform 0.25s ease;
}

.repo-link:hover .repo-link-arrow {
    transform: translateX(3px);
}

/* Agentzoo - Coming Soon 状态卡片 */
.service-card-coming-soon {
    position: relative;
    opacity: 0.75;
    border: 1px dashed var(--border-color);
}

.coming-soon-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: 4px 10px;
    border-radius: 100px;
    background: var(--background-secondary);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* 客户评价 - 苹果风格 */
.testimonials {
    background: var(--background-secondary);
    padding: var(--space-3xl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    background: var(--background-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.testimonial-text {
    font-style: normal;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
    font-size: 16px;
    font-weight: 400;
    position: relative;
}

.testimonial-text::before,
.testimonial-text::after {
    content: '"';
    font-size: 48px;
    color: var(--apple-black);
    opacity: 0.15;
    line-height: 1;
    position: absolute;
}

.testimonial-text::before {
    top: -20px;
    left: -10px;
}

.testimonial-text::after {
    bottom: -40px;
    right: -10px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--apple-black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: 18px;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.author-info h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    font-size: 16px;
}

.author-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 关注我们 - Apple风格 */
.media-qr-section {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--apple-light-gray);
}

.media-layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

/* 二维码行 */
.qr-row {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
}

.qr-item {
    text-align: center;
    flex-shrink: 0;
}

.qr-item img,
.qr-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.qr-item img:hover,
.qr-placeholder:hover {
    transform: scale(1.02);
}

.qr-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ff2442 0%, #ff6b7a 100%);
}

.qr-icon {
    font-size: 40px;
}

.qr-item p {
    margin-top: var(--space-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* 平台链接行 - Apple风格 */
.platform-links-row {
    display: flex;
    justify-content: center;
}

.platform-links-container {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(0, 0, 0, 0.03);
    border-radius: 24px;
    padding: 6px;
}

.platform-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: transparent;
    border-radius: 18px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.platform-link:hover {
    background: rgba(0, 0, 0, 0.06);
}

.platform-icon {
    font-size: 16px;
    line-height: 1;
}

/* 更多按钮 */
.media-more-trigger {
    background: var(--apple-black);
    color: white;
}

.media-more-trigger:hover {
    background: #333;
}

.media-more-trigger[aria-expanded="true"] {
    background: var(--text-secondary);
}

.more-icon {
    font-weight: 600;
    transition: transform 0.3s ease;
}

.media-more-trigger[aria-expanded="true"] .more-icon {
    transform: rotate(45deg);
}

/* 额外平台链接 - 横向展开动画 */
.platform-links-extra {
    display: flex;
    gap: var(--space-xs);
    overflow: hidden;
    max-width: 0;
    opacity: 0;
    transition: max-width 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.3s ease;
}

.platform-links-extra:not([hidden]) {
    max-width: 300px;
    opacity: 1;
}

.platform-links-extra[hidden] {
    display: flex;
}

/* 行动号召 - 苹果风格 */
.cta {
    text-align: center;
    padding: var(--space-3xl) 0;
    background: var(--bg-glass-section);
}

.cta h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    letter-spacing: -0.02em;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Icons', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.cta p {
    font-size: 18px;
    margin-bottom: var(--space-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

/* 科技媒体网格 */
.media-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

/* 页脚 - 黑色背景，与 header 一致 */
footer {
    background: #000000;
    color: rgba(255, 255, 255, 0.6);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    flex: 1;
    min-width: 240px;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.footer-logo {
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.footer-brand > p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    line-height: 1.5;
    max-width: 280px;
    margin: 0;
}

/* 圆形社交按钮 */
.footer-social {
    display: flex;
    gap: var(--space-md);
}

.social-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-circle:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    transform: translateY(-2px);
}

.social-circle svg {
    display: block;
}

/* 文字链接行 */
.footer-text-links {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-text-links a {
    color: rgba(255, 255, 255, 0.45);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s ease;
}

.footer-text-links a:hover {
    color: #ffffff;
}

/* Footer 链接分组 */
.footer-links {
    display: flex;
    gap: var(--space-3xl);
}

.footer-link-group h4 {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-md);
    letter-spacing: 0.02em;
}

.footer-link-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-link-group li {
    margin-bottom: var(--space-sm);
}

.footer-link-group a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.45);
    font-size: 13px;
    transition: color 0.2s ease;
}

.footer-link-group a:hover {
    color: #ffffff;
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.35);
    font-size: 13px;
    line-height: 1.5;
}

/* 二维码小浮窗（悬浮在圆球上方） */
.qr-tooltip {
    position: fixed;
    z-index: 2000;
    display: none;
    background: #ffffff;
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    text-align: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    transform: translateX(-50%);
    pointer-events: none;
}

.qr-tooltip.active {
    display: block;
    animation: qrTooltipIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.qr-tooltip img {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-sm);
    margin: 0;
}

.qr-tooltip span {
    display: block;
    font-size: 12px;
    color: var(--apple-gray);
    margin-top: 6px;
    font-weight: 500;
}

.qr-tooltip-arrow {
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 10px;
    height: 10px;
    background: #ffffff;
}

@keyframes qrTooltipIn {
    from { opacity: 0; transform: translateX(-50%) translateY(8px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* 性能优化 */
body {
    /* 减少重绘和重排 */
    will-change: transform;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 图片优化（如果将来添加图片） */
img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

/* 减少布局抖动 */
.container {
    contain: layout style paint;
}

/* 焦点样式 - 苹果风格 */
a:focus, button:focus {
    outline: 2px solid var(--apple-black);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

/* 加载动画 - 苹果风格 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card, .testimonial-card {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }

.testimonial-card:nth-child(1) { animation-delay: 0.1s; }
.testimonial-card:nth-child(2) { animation-delay: 0.2s; }
.testimonial-card:nth-child(3) { animation-delay: 0.3s; }

/* 悬停效果增强 */
@media (hover: hover) {
    .service-card:hover,
    .testimonial-card:hover {
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
}

/* 触摸设备优化 */
@media (pointer: coarse) {
    .btn {
        min-height: 48px;
        min-width: 140px;
    }
}

/* 返回顶部按钮 - 苹果风格 */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 52px;
    height: 52px;
    background: var(--apple-black);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #333;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.back-to-top:focus {
    outline: 2px solid var(--apple-black);
    outline-offset: 4px;
}

/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--apple-black);
    width: 0%;
    z-index: 1001;
    transition: width 0.1s ease-out;
}